Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.18.2.1
1.1 djm 1: /*
1.18.2.1! jason 2: * Copyright (c) 2001,2002 Damien Miller. All rights reserved.
1.1 djm 3: *
4: * Redistribution and use in source and binary forms, with or without
5: * modification, are permitted provided that the following conditions
6: * are met:
7: * 1. Redistributions of source code must retain the above copyright
8: * notice, this list of conditions and the following disclaimer.
9: * 2. Redistributions in binary form must reproduce the above copyright
10: * notice, this list of conditions and the following disclaimer in the
11: * documentation and/or other materials provided with the distribution.
12: *
13: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23: */
24:
25: /* XXX: memleaks */
26: /* XXX: signed vs unsigned */
1.18.2.1! jason 27: /* XXX: remove all logging, only return status codes */
1.1 djm 28: /* XXX: copy between two remote sites */
29:
30: #include "includes.h"
1.18.2.1! jason 31: RCSID("$OpenBSD: sftp-client.c,v 1.24 2002/02/24 16:57:19 markus Exp $");
! 32:
! 33: #include <sys/queue.h>
1.1 djm 34:
35: #include "buffer.h"
36: #include "bufaux.h"
37: #include "getput.h"
38: #include "xmalloc.h"
39: #include "log.h"
40: #include "atomicio.h"
41:
42: #include "sftp.h"
43: #include "sftp-common.h"
44: #include "sftp-client.h"
45:
1.18.2.1! jason 46: /* Minimum amount of data to read at at time */
! 47: #define MIN_READ_SIZE 512
1.1 djm 48:
1.18.2.1! jason 49: struct sftp_conn {
! 50: int fd_in;
! 51: int fd_out;
! 52: u_int transfer_buflen;
! 53: u_int num_requests;
! 54: u_int version;
! 55: u_int msg_id;
! 56: };
1.4 djm 57:
1.17 itojun 58: static void
1.1 djm 59: send_msg(int fd, Buffer *m)
60: {
61: int mlen = buffer_len(m);
62: int len;
63: Buffer oqueue;
64:
65: buffer_init(&oqueue);
66: buffer_put_int(&oqueue, mlen);
67: buffer_append(&oqueue, buffer_ptr(m), mlen);
68: buffer_consume(m, mlen);
69:
70: len = atomicio(write, fd, buffer_ptr(&oqueue), buffer_len(&oqueue));
71: if (len <= 0)
72: fatal("Couldn't send packet: %s", strerror(errno));
73:
74: buffer_free(&oqueue);
75: }
76:
1.17 itojun 77: static void
1.1 djm 78: get_msg(int fd, Buffer *m)
79: {
80: u_int len, msg_len;
81: unsigned char buf[4096];
82:
83: len = atomicio(read, fd, buf, 4);
1.15 djm 84: if (len == 0)
85: fatal("Connection closed");
86: else if (len == -1)
1.1 djm 87: fatal("Couldn't read packet: %s", strerror(errno));
88:
89: msg_len = GET_32BIT(buf);
90: if (msg_len > 256 * 1024)
91: fatal("Received message too long %d", msg_len);
92:
93: while (msg_len) {
94: len = atomicio(read, fd, buf, MIN(msg_len, sizeof(buf)));
1.15 djm 95: if (len == 0)
96: fatal("Connection closed");
97: else if (len == -1)
1.1 djm 98: fatal("Couldn't read packet: %s", strerror(errno));
99:
100: msg_len -= len;
101: buffer_append(m, buf, len);
102: }
103: }
104:
1.17 itojun 105: static void
1.1 djm 106: send_string_request(int fd, u_int id, u_int code, char *s,
107: u_int len)
108: {
109: Buffer msg;
110:
111: buffer_init(&msg);
112: buffer_put_char(&msg, code);
113: buffer_put_int(&msg, id);
114: buffer_put_string(&msg, s, len);
115: send_msg(fd, &msg);
116: debug3("Sent message fd %d T:%d I:%d", fd, code, id);
117: buffer_free(&msg);
118: }
119:
1.17 itojun 120: static void
1.1 djm 121: send_string_attrs_request(int fd, u_int id, u_int code, char *s,
122: u_int len, Attrib *a)
123: {
124: Buffer msg;
125:
126: buffer_init(&msg);
127: buffer_put_char(&msg, code);
128: buffer_put_int(&msg, id);
129: buffer_put_string(&msg, s, len);
130: encode_attrib(&msg, a);
131: send_msg(fd, &msg);
132: debug3("Sent message fd %d T:%d I:%d", fd, code, id);
133: buffer_free(&msg);
134: }
135:
1.17 itojun 136: static u_int
1.1 djm 137: get_status(int fd, int expected_id)
138: {
139: Buffer msg;
140: u_int type, id, status;
141:
142: buffer_init(&msg);
143: get_msg(fd, &msg);
144: type = buffer_get_char(&msg);
145: id = buffer_get_int(&msg);
146:
147: if (id != expected_id)
148: fatal("ID mismatch (%d != %d)", id, expected_id);
149: if (type != SSH2_FXP_STATUS)
150: fatal("Expected SSH2_FXP_STATUS(%d) packet, got %d",
151: SSH2_FXP_STATUS, type);
152:
153: status = buffer_get_int(&msg);
154: buffer_free(&msg);
155:
156: debug3("SSH2_FXP_STATUS %d", status);
157:
158: return(status);
159: }
160:
1.17 itojun 161: static char *
1.1 djm 162: get_handle(int fd, u_int expected_id, u_int *len)
163: {
164: Buffer msg;
165: u_int type, id;
166: char *handle;
167:
168: buffer_init(&msg);
169: get_msg(fd, &msg);
170: type = buffer_get_char(&msg);
171: id = buffer_get_int(&msg);
172:
173: if (id != expected_id)
174: fatal("ID mismatch (%d != %d)", id, expected_id);
175: if (type == SSH2_FXP_STATUS) {
176: int status = buffer_get_int(&msg);
177:
178: error("Couldn't get handle: %s", fx2txt(status));
179: return(NULL);
180: } else if (type != SSH2_FXP_HANDLE)
181: fatal("Expected SSH2_FXP_HANDLE(%d) packet, got %d",
182: SSH2_FXP_HANDLE, type);
183:
184: handle = buffer_get_string(&msg, len);
185: buffer_free(&msg);
186:
187: return(handle);
188: }
189:
1.17 itojun 190: static Attrib *
1.14 djm 191: get_decode_stat(int fd, u_int expected_id, int quiet)
1.1 djm 192: {
193: Buffer msg;
194: u_int type, id;
195: Attrib *a;
196:
197: buffer_init(&msg);
198: get_msg(fd, &msg);
199:
200: type = buffer_get_char(&msg);
201: id = buffer_get_int(&msg);
202:
203: debug3("Received stat reply T:%d I:%d", type, id);
204: if (id != expected_id)
205: fatal("ID mismatch (%d != %d)", id, expected_id);
206: if (type == SSH2_FXP_STATUS) {
207: int status = buffer_get_int(&msg);
208:
1.14 djm 209: if (quiet)
210: debug("Couldn't stat remote file: %s", fx2txt(status));
211: else
212: error("Couldn't stat remote file: %s", fx2txt(status));
1.1 djm 213: return(NULL);
214: } else if (type != SSH2_FXP_ATTRS) {
215: fatal("Expected SSH2_FXP_ATTRS(%d) packet, got %d",
216: SSH2_FXP_ATTRS, type);
217: }
218: a = decode_attrib(&msg);
219: buffer_free(&msg);
220:
221: return(a);
222: }
223:
1.18.2.1! jason 224: struct sftp_conn *
! 225: do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests)
1.1 djm 226: {
227: int type, version;
228: Buffer msg;
1.18.2.1! jason 229: struct sftp_conn *ret;
1.1 djm 230:
231: buffer_init(&msg);
232: buffer_put_char(&msg, SSH2_FXP_INIT);
233: buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
234: send_msg(fd_out, &msg);
235:
236: buffer_clear(&msg);
237:
238: get_msg(fd_in, &msg);
239:
1.3 stevesk 240: /* Expecting a VERSION reply */
1.1 djm 241: if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) {
242: error("Invalid packet back from SSH2_FXP_INIT (type %d)",
243: type);
244: buffer_free(&msg);
1.18.2.1! jason 245: return(NULL);
1.1 djm 246: }
247: version = buffer_get_int(&msg);
248:
249: debug2("Remote version: %d", version);
250:
251: /* Check for extensions */
252: while (buffer_len(&msg) > 0) {
253: char *name = buffer_get_string(&msg, NULL);
254: char *value = buffer_get_string(&msg, NULL);
255:
256: debug2("Init extension: \"%s\"", name);
257: xfree(name);
258: xfree(value);
259: }
260:
261: buffer_free(&msg);
1.11 djm 262:
1.18.2.1! jason 263: ret = xmalloc(sizeof(*ret));
! 264: ret->fd_in = fd_in;
! 265: ret->fd_out = fd_out;
! 266: ret->transfer_buflen = transfer_buflen;
! 267: ret->num_requests = num_requests;
! 268: ret->version = version;
! 269: ret->msg_id = 1;
! 270:
! 271: /* Some filexfer v.0 servers don't support large packets */
! 272: if (version == 0)
! 273: ret->transfer_buflen = MAX(ret->transfer_buflen, 20480);
! 274:
! 275: return(ret);
! 276: }
! 277:
! 278: u_int
! 279: sftp_proto_version(struct sftp_conn *conn)
! 280: {
! 281: return(conn->version);
1.1 djm 282: }
283:
284: int
1.18.2.1! jason 285: do_close(struct sftp_conn *conn, char *handle, u_int handle_len)
1.1 djm 286: {
287: u_int id, status;
288: Buffer msg;
289:
290: buffer_init(&msg);
291:
1.18.2.1! jason 292: id = conn->msg_id++;
1.1 djm 293: buffer_put_char(&msg, SSH2_FXP_CLOSE);
294: buffer_put_int(&msg, id);
295: buffer_put_string(&msg, handle, handle_len);
1.18.2.1! jason 296: send_msg(conn->fd_out, &msg);
1.1 djm 297: debug3("Sent message SSH2_FXP_CLOSE I:%d", id);
298:
1.18.2.1! jason 299: status = get_status(conn->fd_in, id);
1.1 djm 300: if (status != SSH2_FX_OK)
301: error("Couldn't close file: %s", fx2txt(status));
302:
303: buffer_free(&msg);
304:
305: return(status);
306: }
307:
1.12 djm 308:
1.17 itojun 309: static int
1.18.2.1! jason 310: do_lsreaddir(struct sftp_conn *conn, char *path, int printflag,
1.12 djm 311: SFTP_DIRENT ***dir)
1.1 djm 312: {
313: Buffer msg;
1.13 markus 314: u_int type, id, handle_len, i, expected_id, ents = 0;
1.1 djm 315: char *handle;
316:
1.18.2.1! jason 317: id = conn->msg_id++;
1.1 djm 318:
319: buffer_init(&msg);
320: buffer_put_char(&msg, SSH2_FXP_OPENDIR);
321: buffer_put_int(&msg, id);
322: buffer_put_cstring(&msg, path);
1.18.2.1! jason 323: send_msg(conn->fd_out, &msg);
1.1 djm 324:
325: buffer_clear(&msg);
326:
1.18.2.1! jason 327: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 328: if (handle == NULL)
329: return(-1);
330:
1.12 djm 331: if (dir) {
332: ents = 0;
333: *dir = xmalloc(sizeof(**dir));
334: (*dir)[0] = NULL;
335: }
336:
1.18.2.1! jason 337: for (;;) {
1.1 djm 338: int count;
339:
1.18.2.1! jason 340: id = expected_id = conn->msg_id++;
1.1 djm 341:
342: debug3("Sending SSH2_FXP_READDIR I:%d", id);
343:
344: buffer_clear(&msg);
345: buffer_put_char(&msg, SSH2_FXP_READDIR);
346: buffer_put_int(&msg, id);
347: buffer_put_string(&msg, handle, handle_len);
1.18.2.1! jason 348: send_msg(conn->fd_out, &msg);
1.1 djm 349:
350: buffer_clear(&msg);
351:
1.18.2.1! jason 352: get_msg(conn->fd_in, &msg);
1.1 djm 353:
354: type = buffer_get_char(&msg);
355: id = buffer_get_int(&msg);
356:
357: debug3("Received reply T:%d I:%d", type, id);
358:
359: if (id != expected_id)
360: fatal("ID mismatch (%d != %d)", id, expected_id);
361:
362: if (type == SSH2_FXP_STATUS) {
363: int status = buffer_get_int(&msg);
364:
365: debug3("Received SSH2_FXP_STATUS %d", status);
366:
367: if (status == SSH2_FX_EOF) {
368: break;
369: } else {
370: error("Couldn't read directory: %s",
371: fx2txt(status));
1.18.2.1! jason 372: do_close(conn, handle, handle_len);
1.9 djm 373: return(status);
1.1 djm 374: }
375: } else if (type != SSH2_FXP_NAME)
376: fatal("Expected SSH2_FXP_NAME(%d) packet, got %d",
377: SSH2_FXP_NAME, type);
378:
379: count = buffer_get_int(&msg);
1.7 markus 380: if (count == 0)
381: break;
1.8 stevesk 382: debug3("Received %d SSH2_FXP_NAME responses", count);
1.18.2.1! jason 383: for (i = 0; i < count; i++) {
1.1 djm 384: char *filename, *longname;
385: Attrib *a;
386:
387: filename = buffer_get_string(&msg, NULL);
388: longname = buffer_get_string(&msg, NULL);
389: a = decode_attrib(&msg);
390:
1.12 djm 391: if (printflag)
392: printf("%s\n", longname);
393:
394: if (dir) {
1.16 markus 395: *dir = xrealloc(*dir, sizeof(**dir) *
1.12 djm 396: (ents + 2));
397: (*dir)[ents] = xmalloc(sizeof(***dir));
398: (*dir)[ents]->filename = xstrdup(filename);
399: (*dir)[ents]->longname = xstrdup(longname);
400: memcpy(&(*dir)[ents]->a, a, sizeof(*a));
401: (*dir)[++ents] = NULL;
402: }
1.1 djm 403:
404: xfree(filename);
405: xfree(longname);
406: }
407: }
408:
409: buffer_free(&msg);
1.18.2.1! jason 410: do_close(conn, handle, handle_len);
1.1 djm 411: xfree(handle);
412:
413: return(0);
414: }
415:
416: int
1.18.2.1! jason 417: do_ls(struct sftp_conn *conn, char *path)
1.12 djm 418: {
1.18.2.1! jason 419: return(do_lsreaddir(conn, path, 1, NULL));
1.12 djm 420: }
421:
422: int
1.18.2.1! jason 423: do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
1.12 djm 424: {
1.18.2.1! jason 425: return(do_lsreaddir(conn, path, 0, dir));
1.12 djm 426: }
427:
428: void free_sftp_dirents(SFTP_DIRENT **s)
429: {
430: int i;
1.18.2.1! jason 431:
! 432: for (i = 0; s[i]; i++) {
1.12 djm 433: xfree(s[i]->filename);
434: xfree(s[i]->longname);
435: xfree(s[i]);
436: }
437: xfree(s);
438: }
439:
440: int
1.18.2.1! jason 441: do_rm(struct sftp_conn *conn, char *path)
1.1 djm 442: {
443: u_int status, id;
444:
445: debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
446:
1.18.2.1! jason 447: id = conn->msg_id++;
! 448: send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
! 449: strlen(path));
! 450: status = get_status(conn->fd_in, id);
1.1 djm 451: if (status != SSH2_FX_OK)
452: error("Couldn't delete file: %s", fx2txt(status));
453: return(status);
454: }
455:
456: int
1.18.2.1! jason 457: do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 458: {
459: u_int status, id;
460:
1.18.2.1! jason 461: id = conn->msg_id++;
! 462: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
1.1 djm 463: strlen(path), a);
464:
1.18.2.1! jason 465: status = get_status(conn->fd_in, id);
1.1 djm 466: if (status != SSH2_FX_OK)
467: error("Couldn't create directory: %s", fx2txt(status));
468:
469: return(status);
470: }
471:
472: int
1.18.2.1! jason 473: do_rmdir(struct sftp_conn *conn, char *path)
1.1 djm 474: {
475: u_int status, id;
476:
1.18.2.1! jason 477: id = conn->msg_id++;
! 478: send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
! 479: strlen(path));
1.1 djm 480:
1.18.2.1! jason 481: status = get_status(conn->fd_in, id);
1.1 djm 482: if (status != SSH2_FX_OK)
483: error("Couldn't remove directory: %s", fx2txt(status));
484:
485: return(status);
486: }
487:
488: Attrib *
1.18.2.1! jason 489: do_stat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 490: {
491: u_int id;
492:
1.18.2.1! jason 493: id = conn->msg_id++;
! 494:
! 495: send_string_request(conn->fd_out, id,
! 496: conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
! 497: path, strlen(path));
! 498:
! 499: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 500: }
501:
502: Attrib *
1.18.2.1! jason 503: do_lstat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 504: {
505: u_int id;
506:
1.18.2.1! jason 507: if (conn->version == 0) {
! 508: if (quiet)
! 509: debug("Server version does not support lstat operation");
! 510: else
! 511: error("Server version does not support lstat operation");
! 512: return(NULL);
! 513: }
! 514:
! 515: id = conn->msg_id++;
! 516: send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
! 517: strlen(path));
! 518:
! 519: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 520: }
521:
522: Attrib *
1.18.2.1! jason 523: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 524: {
525: u_int id;
526:
1.18.2.1! jason 527: id = conn->msg_id++;
! 528: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
! 529: handle_len);
! 530:
! 531: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 532: }
533:
534: int
1.18.2.1! jason 535: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 536: {
537: u_int status, id;
538:
1.18.2.1! jason 539: id = conn->msg_id++;
! 540: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 541: strlen(path), a);
542:
1.18.2.1! jason 543: status = get_status(conn->fd_in, id);
1.1 djm 544: if (status != SSH2_FX_OK)
545: error("Couldn't setstat on \"%s\": %s", path,
546: fx2txt(status));
547:
548: return(status);
549: }
550:
551: int
1.18.2.1! jason 552: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 553: Attrib *a)
554: {
555: u_int status, id;
556:
1.18.2.1! jason 557: id = conn->msg_id++;
! 558: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 559: handle_len, a);
560:
1.18.2.1! jason 561: status = get_status(conn->fd_in, id);
1.1 djm 562: if (status != SSH2_FX_OK)
563: error("Couldn't fsetstat: %s", fx2txt(status));
564:
565: return(status);
566: }
567:
568: char *
1.18.2.1! jason 569: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 570: {
571: Buffer msg;
572: u_int type, expected_id, count, id;
573: char *filename, *longname;
574: Attrib *a;
575:
1.18.2.1! jason 576: expected_id = id = conn->msg_id++;
! 577: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
! 578: strlen(path));
1.1 djm 579:
580: buffer_init(&msg);
581:
1.18.2.1! jason 582: get_msg(conn->fd_in, &msg);
1.1 djm 583: type = buffer_get_char(&msg);
584: id = buffer_get_int(&msg);
585:
586: if (id != expected_id)
587: fatal("ID mismatch (%d != %d)", id, expected_id);
588:
589: if (type == SSH2_FXP_STATUS) {
590: u_int status = buffer_get_int(&msg);
591:
592: error("Couldn't canonicalise: %s", fx2txt(status));
593: return(NULL);
594: } else if (type != SSH2_FXP_NAME)
595: fatal("Expected SSH2_FXP_NAME(%d) packet, got %d",
596: SSH2_FXP_NAME, type);
597:
598: count = buffer_get_int(&msg);
599: if (count != 1)
600: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
601:
602: filename = buffer_get_string(&msg, NULL);
603: longname = buffer_get_string(&msg, NULL);
604: a = decode_attrib(&msg);
605:
606: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
607:
608: xfree(longname);
609:
610: buffer_free(&msg);
611:
612: return(filename);
613: }
614:
615: int
1.18.2.1! jason 616: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 617: {
618: Buffer msg;
619: u_int status, id;
620:
621: buffer_init(&msg);
622:
623: /* Send rename request */
1.18.2.1! jason 624: id = conn->msg_id++;
1.1 djm 625: buffer_put_char(&msg, SSH2_FXP_RENAME);
626: buffer_put_int(&msg, id);
627: buffer_put_cstring(&msg, oldpath);
628: buffer_put_cstring(&msg, newpath);
1.18.2.1! jason 629: send_msg(conn->fd_out, &msg);
1.1 djm 630: debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
631: newpath);
632: buffer_free(&msg);
633:
1.18.2.1! jason 634: status = get_status(conn->fd_in, id);
1.1 djm 635: if (status != SSH2_FX_OK)
1.18.2.1! jason 636: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
! 637: newpath, fx2txt(status));
1.1 djm 638:
639: return(status);
1.11 djm 640: }
641:
642: int
1.18.2.1! jason 643: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 644: {
645: Buffer msg;
646: u_int status, id;
647:
1.18.2.1! jason 648: if (conn->version < 3) {
! 649: error("This server does not support the symlink operation");
! 650: return(SSH2_FX_OP_UNSUPPORTED);
! 651: }
! 652:
1.11 djm 653: buffer_init(&msg);
654:
655: /* Send rename request */
1.18.2.1! jason 656: id = conn->msg_id++;
1.11 djm 657: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
658: buffer_put_int(&msg, id);
659: buffer_put_cstring(&msg, oldpath);
660: buffer_put_cstring(&msg, newpath);
1.18.2.1! jason 661: send_msg(conn->fd_out, &msg);
1.11 djm 662: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
663: newpath);
664: buffer_free(&msg);
665:
1.18.2.1! jason 666: status = get_status(conn->fd_in, id);
1.11 djm 667: if (status != SSH2_FX_OK)
1.18.2.1! jason 668: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
! 669: newpath, fx2txt(status));
1.11 djm 670:
671: return(status);
672: }
673:
674: char *
1.18.2.1! jason 675: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 676: {
677: Buffer msg;
678: u_int type, expected_id, count, id;
679: char *filename, *longname;
680: Attrib *a;
681:
1.18.2.1! jason 682: expected_id = id = conn->msg_id++;
! 683: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
! 684: strlen(path));
1.11 djm 685:
686: buffer_init(&msg);
687:
1.18.2.1! jason 688: get_msg(conn->fd_in, &msg);
1.11 djm 689: type = buffer_get_char(&msg);
690: id = buffer_get_int(&msg);
691:
692: if (id != expected_id)
693: fatal("ID mismatch (%d != %d)", id, expected_id);
694:
695: if (type == SSH2_FXP_STATUS) {
696: u_int status = buffer_get_int(&msg);
697:
698: error("Couldn't readlink: %s", fx2txt(status));
699: return(NULL);
700: } else if (type != SSH2_FXP_NAME)
701: fatal("Expected SSH2_FXP_NAME(%d) packet, got %d",
702: SSH2_FXP_NAME, type);
703:
704: count = buffer_get_int(&msg);
705: if (count != 1)
706: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
707:
708: filename = buffer_get_string(&msg, NULL);
709: longname = buffer_get_string(&msg, NULL);
710: a = decode_attrib(&msg);
711:
712: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
713:
714: xfree(longname);
715:
716: buffer_free(&msg);
717:
718: return(filename);
1.1 djm 719: }
720:
1.18.2.1! jason 721: static void
! 722: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
! 723: char *handle, u_int handle_len)
! 724: {
! 725: Buffer msg;
! 726:
! 727: buffer_init(&msg);
! 728: buffer_clear(&msg);
! 729: buffer_put_char(&msg, SSH2_FXP_READ);
! 730: buffer_put_int(&msg, id);
! 731: buffer_put_string(&msg, handle, handle_len);
! 732: buffer_put_int64(&msg, offset);
! 733: buffer_put_int(&msg, len);
! 734: send_msg(fd_out, &msg);
! 735: buffer_free(&msg);
! 736: }
! 737:
1.1 djm 738: int
1.18.2.1! jason 739: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
1.1 djm 740: int pflag)
741: {
742: Attrib junk, *a;
1.18.2.1! jason 743: Buffer msg;
! 744: char *handle;
! 745: int local_fd, status, num_req, max_req, write_error;
! 746: int read_error, write_errno;
! 747: u_int64_t offset, size;
! 748: u_int handle_len, mode, type, id, buflen;
! 749: struct request {
! 750: u_int id;
! 751: u_int len;
! 752: u_int64_t offset;
! 753: TAILQ_ENTRY(request) tq;
! 754: };
! 755: TAILQ_HEAD(reqhead, request) requests;
! 756: struct request *req;
1.1 djm 757:
1.18.2.1! jason 758: TAILQ_INIT(&requests);
! 759:
! 760: a = do_stat(conn, remote_path, 0);
1.1 djm 761: if (a == NULL)
762: return(-1);
763:
764: /* XXX: should we preserve set[ug]id? */
765: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
766: mode = S_IWRITE | (a->perm & 0777);
767: else
768: mode = 0666;
769:
1.14 djm 770: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
771: (a->perm & S_IFDIR)) {
772: error("Cannot download a directory: %s", remote_path);
773: return(-1);
774: }
775:
1.18.2.1! jason 776: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
! 777: size = a->size;
! 778: else
! 779: size = 0;
1.1 djm 780:
1.18.2.1! jason 781: buflen = conn->transfer_buflen;
1.1 djm 782: buffer_init(&msg);
783:
784: /* Send open request */
1.18.2.1! jason 785: id = conn->msg_id++;
1.1 djm 786: buffer_put_char(&msg, SSH2_FXP_OPEN);
787: buffer_put_int(&msg, id);
788: buffer_put_cstring(&msg, remote_path);
789: buffer_put_int(&msg, SSH2_FXF_READ);
790: attrib_clear(&junk); /* Send empty attributes */
791: encode_attrib(&msg, &junk);
1.18.2.1! jason 792: send_msg(conn->fd_out, &msg);
1.1 djm 793: debug3("Sent message SSH2_FXP_OPEN I:%d P:%s", id, remote_path);
794:
1.18.2.1! jason 795: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 796: if (handle == NULL) {
797: buffer_free(&msg);
1.18.2.1! jason 798: return(-1);
! 799: }
! 800:
! 801: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC, mode);
! 802: if (local_fd == -1) {
! 803: error("Couldn't open local file \"%s\" for writing: %s",
! 804: local_path, strerror(errno));
! 805: buffer_free(&msg);
! 806: xfree(handle);
1.1 djm 807: return(-1);
808: }
809:
810: /* Read from remote and write to local */
1.18.2.1! jason 811: write_error = read_error = write_errno = num_req = offset = 0;
! 812: max_req = 1;
! 813: while (num_req > 0 || max_req > 0) {
1.1 djm 814: char *data;
1.18.2.1! jason 815: u_int len;
1.1 djm 816:
1.18.2.1! jason 817: /* Send some more requests */
! 818: while (num_req < max_req) {
! 819: debug3("Request range %llu -> %llu (%d/%d)",
! 820: offset, offset + buflen - 1, num_req, max_req);
! 821: req = xmalloc(sizeof(*req));
! 822: req->id = conn->msg_id++;
! 823: req->len = buflen;
! 824: req->offset = offset;
! 825: offset += buflen;
! 826: num_req++;
! 827: TAILQ_INSERT_TAIL(&requests, req, tq);
! 828: send_read_request(conn->fd_out, req->id, req->offset,
! 829: req->len, handle, handle_len);
! 830: }
1.1 djm 831:
832: buffer_clear(&msg);
1.18.2.1! jason 833: get_msg(conn->fd_in, &msg);
1.1 djm 834: type = buffer_get_char(&msg);
835: id = buffer_get_int(&msg);
1.18.2.1! jason 836: debug3("Received reply T:%d I:%d R:%d", type, id, max_req);
! 837:
! 838: /* Find the request in our queue */
! 839: for(req = TAILQ_FIRST(&requests);
! 840: req != NULL && req->id != id;
! 841: req = TAILQ_NEXT(req, tq))
! 842: ;
! 843: if (req == NULL)
! 844: fatal("Unexpected reply %u", id);
! 845:
! 846: switch (type) {
! 847: case SSH2_FXP_STATUS:
1.5 djm 848: status = buffer_get_int(&msg);
1.18.2.1! jason 849: if (status != SSH2_FX_EOF)
! 850: read_error = 1;
! 851: max_req = 0;
! 852: TAILQ_REMOVE(&requests, req, tq);
! 853: xfree(req);
! 854: num_req--;
! 855: break;
! 856: case SSH2_FXP_DATA:
! 857: data = buffer_get_string(&msg, &len);
! 858: debug3("Received data %llu -> %llu", req->offset,
! 859: req->offset + len - 1);
! 860: if (len > req->len)
! 861: fatal("Received more data than asked for "
! 862: "%d > %d", len, req->len);
! 863: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
! 864: atomicio(write, local_fd, data, len) != len) &&
! 865: !write_error) {
! 866: write_errno = errno;
! 867: write_error = 1;
! 868: max_req = 0;
! 869: }
! 870: xfree(data);
1.1 djm 871:
1.18.2.1! jason 872: if (len == req->len) {
! 873: TAILQ_REMOVE(&requests, req, tq);
! 874: xfree(req);
! 875: num_req--;
! 876: } else {
! 877: /* Resend the request for the missing data */
! 878: debug3("Short data block, re-requesting "
! 879: "%llu -> %llu (%2d)", req->offset + len,
! 880: req->offset + req->len - 1, num_req);
! 881: req->id = conn->msg_id++;
! 882: req->len -= len;
! 883: req->offset += len;
! 884: send_read_request(conn->fd_out, req->id,
! 885: req->offset, req->len, handle, handle_len);
! 886: /* Reduce the request size */
! 887: if (len < buflen)
! 888: buflen = MAX(MIN_READ_SIZE, len);
1.1 djm 889: }
1.18.2.1! jason 890: if (max_req > 0) { /* max_req = 0 iff EOF received */
! 891: if (size > 0 && offset > size) {
! 892: /* Only one request at a time
! 893: * after the expected EOF */
! 894: debug3("Finish at %llu (%2d)",
! 895: offset, num_req);
! 896: max_req = 1;
! 897: }
! 898: else if (max_req < conn->num_requests + 1) {
! 899: ++max_req;
! 900: }
! 901: }
! 902: break;
! 903: default:
1.1 djm 904: fatal("Expected SSH2_FXP_DATA(%d) packet, got %d",
905: SSH2_FXP_DATA, type);
906: }
907: }
1.5 djm 908:
1.18.2.1! jason 909: /* Sanity check */
! 910: if (TAILQ_FIRST(&requests) != NULL)
! 911: fatal("Transfer complete, but requests still in queue");
! 912:
! 913: if (read_error) {
! 914: error("Couldn't read from remote file \"%s\" : %s",
! 915: remote_path, fx2txt(status));
! 916: do_close(conn, handle, handle_len);
! 917: } else if (write_error) {
! 918: error("Couldn't write to \"%s\": %s", local_path,
! 919: strerror(write_errno));
! 920: status = -1;
! 921: do_close(conn, handle, handle_len);
! 922: } else {
! 923: status = do_close(conn, handle, handle_len);
! 924:
! 925: /* Override umask and utimes if asked */
! 926: if (pflag && fchmod(local_fd, mode) == -1)
! 927: error("Couldn't set mode on \"%s\": %s", local_path,
! 928: strerror(errno));
! 929: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
! 930: struct timeval tv[2];
! 931: tv[0].tv_sec = a->atime;
! 932: tv[1].tv_sec = a->mtime;
! 933: tv[0].tv_usec = tv[1].tv_usec = 0;
! 934: if (utimes(local_path, tv) == -1)
! 935: error("Can't set times on \"%s\": %s",
! 936: local_path, strerror(errno));
! 937: }
1.10 djm 938: }
1.5 djm 939: close(local_fd);
940: buffer_free(&msg);
1.1 djm 941: xfree(handle);
1.18.2.1! jason 942:
! 943: return(status);
1.1 djm 944: }
945:
946: int
1.18.2.1! jason 947: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
1.1 djm 948: int pflag)
949: {
1.18.2.1! jason 950: int local_fd, status;
! 951: u_int handle_len, id, type;
1.1 djm 952: u_int64_t offset;
1.18.2.1! jason 953: char *handle, *data;
1.1 djm 954: Buffer msg;
955: struct stat sb;
956: Attrib a;
1.18.2.1! jason 957: u_int32_t startid;
! 958: u_int32_t ackid;
! 959: struct outstanding_ack {
! 960: u_int id;
! 961: u_int len;
! 962: u_int64_t offset;
! 963: TAILQ_ENTRY(outstanding_ack) tq;
! 964: };
! 965: TAILQ_HEAD(ackhead, outstanding_ack) acks;
! 966: struct outstanding_ack *ack;
! 967:
! 968: TAILQ_INIT(&acks);
1.1 djm 969:
970: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
971: error("Couldn't open local file \"%s\" for reading: %s",
972: local_path, strerror(errno));
973: return(-1);
974: }
975: if (fstat(local_fd, &sb) == -1) {
976: error("Couldn't fstat local file \"%s\": %s",
977: local_path, strerror(errno));
978: close(local_fd);
979: return(-1);
980: }
981: stat_to_attrib(&sb, &a);
982:
983: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
984: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
985: a.perm &= 0777;
986: if (!pflag)
987: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
988:
989: buffer_init(&msg);
990:
991: /* Send open request */
1.18.2.1! jason 992: id = conn->msg_id++;
1.1 djm 993: buffer_put_char(&msg, SSH2_FXP_OPEN);
994: buffer_put_int(&msg, id);
995: buffer_put_cstring(&msg, remote_path);
996: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
997: encode_attrib(&msg, &a);
1.18.2.1! jason 998: send_msg(conn->fd_out, &msg);
1.1 djm 999: debug3("Sent message SSH2_FXP_OPEN I:%d P:%s", id, remote_path);
1000:
1001: buffer_clear(&msg);
1002:
1.18.2.1! jason 1003: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1004: if (handle == NULL) {
1005: close(local_fd);
1006: buffer_free(&msg);
1007: return(-1);
1008: }
1009:
1.18.2.1! jason 1010: startid = ackid = id + 1;
! 1011: data = xmalloc(conn->transfer_buflen);
! 1012:
1.1 djm 1013: /* Read from local and write to remote */
1014: offset = 0;
1.18.2.1! jason 1015: for (;;) {
1.1 djm 1016: int len;
1017:
1018: /*
1019: * Can't use atomicio here because it returns 0 on EOF, thus losing
1020: * the last block of the file
1021: */
1022: do
1.18.2.1! jason 1023: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1024: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1025:
1026: if (len == -1)
1027: fatal("Couldn't read from \"%s\": %s", local_path,
1028: strerror(errno));
1.18.2.1! jason 1029:
! 1030: if (len != 0) {
! 1031: ack = xmalloc(sizeof(*ack));
! 1032: ack->id = ++id;
! 1033: ack->offset = offset;
! 1034: ack->len = len;
! 1035: TAILQ_INSERT_TAIL(&acks, ack, tq);
! 1036:
! 1037: buffer_clear(&msg);
! 1038: buffer_put_char(&msg, SSH2_FXP_WRITE);
! 1039: buffer_put_int(&msg, ack->id);
! 1040: buffer_put_string(&msg, handle, handle_len);
! 1041: buffer_put_int64(&msg, offset);
! 1042: buffer_put_string(&msg, data, len);
! 1043: send_msg(conn->fd_out, &msg);
! 1044: debug3("Sent message SSH2_FXP_WRITE I:%d O:%llu S:%u",
! 1045: id, (u_int64_t)offset, len);
! 1046: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1047: break;
1048:
1.18.2.1! jason 1049: if (ack == NULL)
! 1050: fatal("Unexpected ACK %u", id);
! 1051:
! 1052: if (id == startid || len == 0 ||
! 1053: id - ackid >= conn->num_requests) {
! 1054: buffer_clear(&msg);
! 1055: get_msg(conn->fd_in, &msg);
! 1056: type = buffer_get_char(&msg);
! 1057: id = buffer_get_int(&msg);
! 1058:
! 1059: if (type != SSH2_FXP_STATUS)
! 1060: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
! 1061: "got %d", SSH2_FXP_STATUS, type);
1.1 djm 1062:
1.18.2.1! jason 1063: status = buffer_get_int(&msg);
! 1064: debug3("SSH2_FXP_STATUS %d", status);
! 1065:
! 1066: /* Find the request in our queue */
! 1067: for(ack = TAILQ_FIRST(&acks);
! 1068: ack != NULL && ack->id != id;
! 1069: ack = TAILQ_NEXT(ack, tq))
! 1070: ;
! 1071: if (ack == NULL)
! 1072: fatal("Can't find request for ID %d", id);
! 1073: TAILQ_REMOVE(&acks, ack, tq);
! 1074:
! 1075: if (status != SSH2_FX_OK) {
! 1076: error("Couldn't write to remote file \"%s\": %s",
! 1077: remote_path, fx2txt(status));
! 1078: do_close(conn, handle, handle_len);
! 1079: close(local_fd);
! 1080: goto done;
! 1081: }
! 1082: debug3("In write loop, ack for %u %d bytes at %llu",
! 1083: ack->id, ack->len, ack->offset);
! 1084: ++ackid;
! 1085: free(ack);
! 1086: }
1.1 djm 1087: offset += len;
1088: }
1.18.2.1! jason 1089: xfree(data);
1.1 djm 1090:
1091: if (close(local_fd) == -1) {
1092: error("Couldn't close local file \"%s\": %s", local_path,
1093: strerror(errno));
1.18.2.1! jason 1094: do_close(conn, handle, handle_len);
1.5 djm 1095: status = -1;
1096: goto done;
1.1 djm 1097: }
1098:
1.10 djm 1099: /* Override umask and utimes if asked */
1100: if (pflag)
1.18.2.1! jason 1101: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1102:
1.18.2.1! jason 1103: status = do_close(conn, handle, handle_len);
1.5 djm 1104:
1105: done:
1106: xfree(handle);
1107: buffer_free(&msg);
1.18.2.1! jason 1108: return(status);
1.1 djm 1109: }
![[BACK]](/icons/back.gif){kind=icon}
Return to sftp-client.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / ssh